The efficient is of great importance in a distributed database management system. For simple query, it is possible to design optimization algorithm that derive optimal distribution strategies. In this paper, a query with tree structure is extension of...
The efficient is of great importance in a distributed database management system. For simple query, it is possible to design optimization algorithm that derive optimal distribution strategies. In this paper, a query with tree structure is extension of simple query.
To reduce data transmission cost and to fully eliminate relations that is not necessary in result site, efficient algorithm for TSQ-query that considers semijoin operation sequence is presented.